Hackers who cracked the Domino's Pizza database say they have stolen the details of more than 600,000 customers – including their favourite toppings.

A hacker known only as Rex Mundi said the full details would be released today unless the firm paid him or her €30,000 (£24,000).

Mundi said the "vulnerable" shared servers of Domino's Pizza in France and Belgium were compromised, with a range of customer details stolen.

The hacker than added that they even stole details of customers' favourite pizza toppings, "because why not?"

Image Caption:A tweet posted by "Rex Mundi" on Sunday

But Domino's Pizza executive Andre ten Wolde said the ransom demand would not be paid, according to a Dutch newspaper, and a complaint had been filed with a court in Paris.

He stressed that financial data such as credit cards, had not been stolen.

"There are clear indications that something is broken on our server," he said.

In a message posted to an online clipboard, Mundi said: "Earlier this week, we hacked our way into the servers of Domino's Pizza France and Belgium, who happen to share the same vulnerable database.

"And boy, did we find some juicy stuff in there! We downloaded over 592,000 customer records (including passwords) from French customers and over 58,000 records from Belgian ones.

"That's over six hundred thousand records, which include the customers' full names, addresses, phone numbers, email addresses, passwords and delivery instructions. (Oh, and their favorite pizza topping as well, because why not)."

The hacker later posted a tweet saying: "If Domino's Pizza doesn't pay us (on Monday) and we publish your data, you have the right to sue them. Speak to your lawyer."